2020 · 替代规则（核心规则变体）
BESM Extras
A supplement for BESM Fourth Edition featuring rules variations, expanded game mechanics, optional guidelines, and additional tools for creating and running adventures. It includes ready-to-use examples of spells, powers, and items across 144 full-colour illustrated pages.
资料书（用于增强玩法的规则/选项）骰子（主要为 d6）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 BESM Extras
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。